class_docstr: Class for Grassmann manifolds :math:`Gr(n, p)`.
  
  Parameters
  ----------
  n : int
      Dimension of the Euclidean space.
  p : int
      Dimension of the subspaces.
code: def _define_embedding_space(self):
      return SymmetricMatrices(self.n)
  
imports: import geomstats.backend
  import geomstats.errors
  from geomstats.geometry.base import LevelSet
  from geomstats.geometry.general_linear import GeneralLinear
  from geomstats.geometry.matrices import Matrices, MatricesMetric
  from geomstats.geometry.symmetric_matrices import SymmetricMatrices
  from geomstats.vectorization import repeat_out
label_desc: Use image node_id 2 for calling the Grassmannian obj's underlying member method code with example usage: obj._define_embedding_space() and returns: SymmetricMatrices